Lining for boilers and furnaces



Jan. 25,1927. 1,615,785

R. F. B-URGIN I LINING FOR BOILERS AND FURNACES Filed Nov. 24, 1923 2' Sheets-Sheetl Jag. 25, 1927. R F. BURGIN LINING FOR BOILERS AND FURNACES 2 Sheets-Sheet 2 auto: "@1441.

s q o, o S o o m.\\\\\ 6 o 0 Q s Q Q 0 o o a z o o o d E h\ ama FEE- ROBERT F. BURGIN, OF BUENA VISTA, GEDRGIA, ASSIGNOR TO A. B. FARQUHAR CO. LTD., OF YORK, PENNSYLVANIA, A LIMITED PARTNERSHIP OF PENNSYLVANIA.

LINING non BorLnns Ann summons.

Application filed November 24, 1923. Serial No. 676,787.

This invention relates to boilers of the return flue or Cornish type and more particularly to portable boilers designed for burning wood slabs and other refuse.

Boilers of this type have heretofore burned out quickly in the smoke boxes and have required repairs or renewals within unreasonable time after installation. As a matter of fact the smoke box of a boilerof this type has heretofore been the weakest portion of the structure as far as durability is concerned. Various means have been employed for preventing the rapid burning out of the smoke box but such means have not been efiicient. here brick or plastic linings have been applied they soon become cracked andbroken as the result of the distortions and other strains to which the boiler is subjected while being drawn from place to place and where metal linings or the like have been used they have not been efficient because they merely retard the overheating of the shell and do not prevent warping and ultimate cracking or burning thereof long before other parts of the boiler have become useless.

One of the objects of the present invention is to provide a novel form of lining for that portion of the shell of a boiler constituting the wall of the smoke box, the lining being so constructed as to provide an air space or jacket between it and the shell within which gases may circulate freely, said lining being made up of sections that can be readily replaced when desired.

A further object is to provide the lining with apertures through which gases can circulate to and from the air jacket, therebv preventing cinders and other solids from accumulating on the lining, the circulation of gases within the jacket and through the apertures. which is created by the draft through the boiler being sufficient to carry away any particles that would otherwise be left to accumulate in the bottom of the smoke box.

Another object is to' provide the smoke box with a closure which, when opened, gives free access to all portions of the smoke box so that replacements and repairs can be easily effected, said closure being made up of one or more doors and the said closure being likewise formed with a lining spaced therefrom and perforated.

lVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit ofthe invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings- Figure 1 is an end elevation of a boiler having the present improvements combined therewith, one'of the doors of the smoke box being open.

Fig. 2 is a section online 22, Fig. 1.

Fig- 3 is a section on line 3-3, Fig. 1.

Fig. 4 is an elevation of the outer face gf one of the lining members of the smoke Referring to the figures by characters of reference 1 designates a portion of the shell of a boiler providedwith the usual plate 2 in which are mounted one end of the inner shell or drum 3 and the fire fiues 4. A frame 5 is mounted on the end of the shell 1 as is ordinarily done and hingedly connected to this frame at diametrically opposed points are segmental doors 6 adapted to close the end of the shell. These doors have their meeting edges stepped as shown at 7 so as to lap when the doors are closed and one of the doors has slotted ears 8 extending in opposite directions therefrom for engagement by bolts 9 pivotally connected to the shell as shown at 10. After the doors have been closed the bolts can be swung into the slots 8 after which nuts ll mounted on the bolts. can'be tightened, thereby to hold the doors firmly shut.

The smoke box 12, which is that portion of the boiler between the plate 2 and the doors 6 is provided with a lining made up of plates 13 each of which has spacing lugs 14 extending therefrom near the corners thereof and adapted to bear against the shell 1. The longitudinal edges of the lining plates are rabbeted or stepped as shown at 15 so that when the plates are assembled to provide a continuous lining within the smoke box, they will lap at their meeting sides. Bosses 16 are formed on the plates 13 and have threaded stems or bolts 17' projecting therefrom and through openings 18 in the i the smoke box.

shell. As illustrated on Figs. 3 and 4, these bosses 16 with their bolts 17 are arranged preferably in a line parallel to the axis of the chamber and not at the ends of the sections. This construction has been found to be advantageous in that a minimum number of bolts is required while at the same time, there is less liability of breakage from undesirable expansion. Thus by inserting these stems or bolts into the openings and placing nuts 19 in engagement therewith the plates can be fastened securely to the shell but can be removed readily therefrom. Each of the plates has a number of openings 20 therein. When the plates are assembled to provide a continuous lining they form a jacket or air space 21 between them and the shell and this space communicates with the interior of the smoke box through the numerous openings 20 in the several plates.

Segmental lining plates 22 are mounted on the doors 6 and are likewise bolted to the doors as has heretofore been explained with reference to the plates 13, these plates 22 forming lapped joints as at 23 and providing a space 2st between them and the doors. Apertures 25 are formed in the plates 22 so that gases can circulate freely. hen the doors are closed the plates 22 come close to the ends of the plates 13 thereby to afford a thorough protection for the shell 1 from the direct action of the burning gases in the smoke box.

By providing a lining such as has been described the spaces between the lining and the shell 1 and doors 6 will prevent the too rapid conduction of heat to the shell and doors and will also prevent warping and distortion of the structure such as takes place under the direct application of tire thereto. By providing the apertures the gases will be free to pass through certain of the apertures and swirl. within the spaces back of the lining plates after which they will flow back through other openings in the lining plates and carry with them any particles that may have been precipitated within This circulation of the gases through the lining plates is irregular but insures the removal from the smoke box of the greater portion of the soot and cinders that would otherwise be retained therein. Consequently it is unnecessary to clean the smoke box as often as heretofore and if, by chance, any part of the space back of the plates should become clogged, one or more of the plates can be detached and removed readily, the spaces 21 and 24 cleaned out and the lining plates replaced. The lining will not become cracked or broken through distortion and vibration resulting from the movement of the boiler from place to place and as the doors, when open, expose the entire interior of the smoke box any necessary repairs or replacements can be made very easily without requiring the services of a skilled inechanic.

By using a lining such as described a con siderable saving in fuel effected both by the conservation of heat that would otherwise be radiated through the shell of the smoke box and by the utilization of combustible particles that would otherwise be precipitated in the smoke box. By making the lining sectional it allows for necessary expansion and contraction and the parts will not work loose when the boiler is hauled over the roughest roads.

Although the invention is designed primarily for use with boilers of the type herein mentioned it is to be understood that it can be used successfully in other boilers.

By providing the doors with sectional linings, one or more of the sections can be removed if burned out or otherwise injured. It is preferred to use a small lower section on each door where the lining is most likely to need renewing. Thus the cost of renewal. is greatly reduced.

\Vhat is claimed is 1. The combination with the smoke-box of a boiler, of separate lining sections having opposed edges reduced longitudinally, the meeting edges of the sections lapping, spacing lugs extending from each section for maintaining all portions of the section equidistant from the wall of the smoke-box, a fastening bolt anchored in each section, and means engaging the bolt for holding the lugs tightly pressed against the wall of the box.

2. The combination with the smoke-box of a boiler, of lining sections having lapping edges, spacing lugs extending from each section, and means anchored in each section and engaging the walls of the smoke box for binding the lugs against said walls, there being a continuous circumferential air space between the lining and the wall of the smoke box.

3. The combination with the smoke box of a boiler, of lining sections having lapping edges, spacing lugs extending from each section, and means anchored in each section and engaging the wall of the smoke box for binding the lugs against said wall, there being a continuous circumferential air space between the lining and the wall of the smoke box, there being apertures within the lining sections, doors hingedly connected to the wall of the smoke box, asectional lining comprising lapping members extending over the inner surfaces of the doors, spacing lugs upon said members, and means anchored to the members and engaging the doors for binding the lugs against the doors, there being a continuous air space between the doors and the lining sections.

A boiler having a combustion chamber having an air cooled" outside wall, a lining therefor, the lining being spaced wholly from the wall of the combustion chamber and means for holding the lining in position in spaced relation to the combustion chamber wall, the space between thelining and wall being co-extensive with the lining, said means having very small contacting surface with the wall whereby the conduction of heat from the lining to the outer wall is minimized.

A boiler having a combustion chamber, a metallic lining therefor, the lining being constructed in complementary sections and spaced from the wall of the combustion chamber, the space between the lining and wall extending throughout the axial length of the lining and means for holding the lining in position in spaced relation to the combustion chamber wall, said means being of a shape and so placed as to permit of a free air or gas communication between the spaces outward of adjacent lining sections.

6. Av boiler having a combustion chamber, a perforated metallic lining therefor, the lining being spaced from the wall of the combustion chamber and being constructed in complementary sections, the space between the lining and wall extending throughout the axial length of the lining, and means for holding the lining sections in position in spaced relation to the chamber wall, said means being of a shape to permit free air or gas communication from the space between the Wall and one lining section to the space between the wall and the adjacent section.

7. A boiler having a combustion chamber, a lining therefor, the lining being constructed in complementary sections, spacing lugs extending from each section and means anchored in each section and engaging the wall of the combustion chamber for binding the lugs against the wall, there being a continuous circumferential air or gas space hetween the lining and the Wall of the combustion chamber.

8. A bo1ler having a combustion chamber,

a metallic lining therefor, the lining being spaced from the walls of the combustion chamber and being constructed in complementary sections, the sections having portions overlapping adjacent sections, means for holding the sections, including the overlapping portions, in spaced relation from the walls of the chamber, said means having a small cross sectional area relatively to the lining to reduce to a minimum the conductivity between the lining and the wall.

9. A boiler having a combustion chamber, a door at the end thereof, a perforated lining for the combustion chamber, the lining comprising a plurality of sections for the cylindrical wall and a section for the door, spacing members between the respective sections of the lining and the wall of the combustion chamber and the door section, the edge of the door section and the adjacent edges of adjacent cylindrical wall lining sections being adjacent each other, the edge of the door section being spaced from the cylindrical wall and the adjacent edges of the cylindrical wall lining sect-ions being spaced from the door. 7

10. A boiler having a rear combustion chamber, a metallic lining therefor, the lining comprising a plurality of sections, a plurality of means connecting one of the sections to the wall of the rear combustion chamber and located substantially in a line parallel to the axis of the chamber.

11. A boiler having a rear combustion chamber, a metallic lining therefor, the lining comprising a plurality of metallic sections, means for connecting the respective sections to the side wall of the rear combustion chamber, the means for one section comprising a plurality of fastening members being spaced apart and in a line parallel to the axis of the chamber.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

ROBERT F. BURGIN. 

